usr/src/lib/libcurses/delwin.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)delwin.c    5.1 (Berkeley) %G%";
#endif not lint

# include       "curses.ext"

/*
 *      This routine deletes a window and releases it back to the system.
 *
 */
delwin(win)
reg WINDOW      *win; {

        reg int         i;
        reg WINDOW      *wp, *np;

        if (win->_orig == NULL) {
                /*
                 * If we are the original window, delete the space for
                 * all the subwindows, and the array of space as well.
                 */
                for (i = 0; i < win->_maxy && win->_y[i]; i++)
                        free(win->_y[i]);
                free(win->_firstch);
                free(win->_lastch);
                wp = win->_nextp;
                while (wp != win) {
                        np = wp->_nextp;
                        delwin(wp);
                        wp = np;
                }
        }
        else {
                /*
                 * If we are a subwindow, take ourselves out of the
                 * list.  NOTE: if we are a subwindow, the minimum list
                 * is orig followed by this subwindow, so there are
                 * always at least two windows in the list.
                 */
                for (wp = win->_nextp; wp->_nextp != win; wp = wp->_nextp)
                        continue;
                wp->_nextp = win->_nextp;
        }
        free(win->_y);
        free(win);
}